Specifications: Material: Silicone, PU Unit size: 40mm Standard impedance: 32 Frequency response range: 20Hz-20KHz Sound pressure level (SPL, 1KHz): 120dB Bluetooth version: 5.0+EDR Bluetooth chip: Jerry 6925D Bluetooth protocol: A2DP, AVRCP, HSP, HFP Noise reduction sensitivity: 15-25dB Bluetooth distance: 10 m/32.81ft Charging time: about 4 hours Capacity: 200mAh (Volume below 70%, can work for 8 hours) Audio input: wireless/TF Card/support wired input Size: 15cm8cm17cm/5.91inches3.15inches6.69inchesColor: black, red, golden, whiteNote:1.Light and monitor setting may cause slight color difference. 2.Please allow slight deviation as all dimensions are measured manually. The image is only for reference.Promise: Iftheproducthasanyqualityproblems,pleasefeelfreetocontactus,wewillhelpyousolvetheproblemasquicklyaspossible.Package Contents: 1 * Headphone 1 * Manual 1 * USB cable 1 * 3.5MM audio cable